18535+7547 STF 2452 (233 Dra)

Coord 2000	18535+7547		Discov num	STF2452		Comp			Coord arcsec 2000	18 53 33.24 +75 47 14.6
Date first	1825		Date last	2019		Obs	89
Pa first	218		Pa last	217.1		P.A. Now (θ)	217.1°
Sep first	6.5		Sep last	5.669		Sep. Now (ρ)	5.669"
Mag pri	6.73		Mag sec	7.35		delta mag (ΔM)	0.62		Spectral class	A1V (white)
Pri motion ra	+009		Sec motion ra	+009
Pri motion dec	+020		Sec motion dec	+020
Notes	N (See Notes)

Nature of this double is uncertain.

Name	233 Dra		Constellation	Draco		SAO	9286		HIP	92717
Tycho2	4583-02837-1		Gaia DR2	2268560738875917440		HD	176795		HR	7199
GC	26036		ADS	11870		BD	BD+75 683		Flamsteed	233 Draconis
Flamsteed name	233 Dra		Distance	246.31		Distance ly	803.46

discov_num	notes	refcode
STF2452	233 Dra. A spectroscopic binary.	D__1883
	Aka H 2 31 = S 713.	Bu_1906

refcode	metd	author	reference
Bu_1906	Ma j	Burnham, S.W.	1906QB821.B972.....
Bu_1906	+M	Burnham Double Star Cat., 1906
D__1883	Ma -	Dembowski, H.	...................
D__1883		Misure micrometriche di Stelle Doppie e multiple...
D__1883		(Rome, Coi tipi del Salviucci), vol. I, 1883

idgroup	discov	author
1	STF	Struve, F.G.W.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
18535+7547	STF2452		2006	74	218	5.6	6.73	7.35	A1V	N D	185333.24+754714.6
18535+7547	STF2452		2008	75	218	5.7	6.73	7.35	A1V	N D	185333.24+754714.6
18535+7547	STF2452		2009	76	218	5.6	6.73	7.35	A1V	N D	185333.24+754714.6
18535+7547	STF2452		2010	77	218	5.6	6.73	7.35	A1V	N D	185333.24+754714.6
18535+7547	STF2452		2012	79	218	5.4	6.73	7.35	A1V	N D	185333.24+754714.6
18535+7547	STF2452		2013	81	218	5.1	6.73	7.35	A1V	N D	185333.24+754714.6
18535+7547	STF2452		2014	82	218	5.6	6.73	7.35	A1V	N D	185333.24+754714.6
18535+7547	STF2452		2015	83	218	5.6	6.73	7.35	A1V	N	185333.24+754714.6
18535+7547	STF2452		2016	85	218	5.7	6.73	7.35	A1V	N	185333.24+754714.6
18535+7547	STF2452		2017	86	216	5.7	6.73	7.35	A1V	N	185333.24+754714.6
18535+7547	STF2452		2018	88	219	5.7	6.73	7.35	A1V	N	185333.24+754714.6
18535+7547	STF2452		2019	89	218	5.7	6.73	7.35	A1V	N	185333.24+754714.6

If you need more information about this double, apply for a data request form to the WDS.

Show	date	username	difficulty	separation	pa_estim	interest	notes
Show	22/07/21	daedalus1	mean difficulty	separated	218		Seeing: Pickering 8, excellent. Measures: theta 218, rho 5.7 +/-0.112

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